CN217925719U - Concentric positioning frame for drill rod and core pile of inclined drilling rotary spraying stirring pile planting equipment - Google Patents
Concentric positioning frame for drill rod and core pile of inclined drilling rotary spraying stirring pile planting equipment Download PDFInfo
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- CN217925719U CN217925719U CN202221853955.8U CN202221853955U CN217925719U CN 217925719 U CN217925719 U CN 217925719U CN 202221853955 U CN202221853955 U CN 202221853955U CN 217925719 U CN217925719 U CN 217925719U
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Abstract
The utility model discloses a concentric positioning frame for a drill rod and a core pile of inclined drilling rotary spraying stirring pile planting equipment, the cross section shape of the concentric positioning frame is the same as that of an inner hole of the core pile, the concentric positioning frame is in clearance fit with the inner hole of the core pile, and a circular center hole of the concentric positioning frame is in clearance fit with the outer circumference of the drill rod; one or more concentric positioning frames are arranged, and one concentric positioning frame is positioned at the inner bottom end of the core pile; the drill rods at the two ends of the concentric positioning frame are provided with concentric positioning frame axial limiting structures; the axial limiting structure is an axial limiting ring welded on the drill rod at two ends of the concentric positioning frame; the concentric positioning frame matched with the square hole of the steel lattice column core pile is a square frame, the centers of two ends of the square frame are respectively provided with a drill rod sleeve, and the axis of the circular center hole of the drill rod sleeve and the axis of the square frame are on the same straight line. The concentric positioning frame can prevent the lower end of the drill rod from drooping, the drilled hole has high linearity, and the concentricity of the core pile and the cement soil rotary spraying stirring pile is good.
Description
Technical Field
The utility model relates to a excavation supporting technology field, a concentric locating rack that is used for inclined drilling to spout stirring pile planting equipment drilling rod and core pile soon specifically says. The concentric positioning frame is used for the drill rod and the core pile of the inclined drilling rotary spraying stirring pile planting equipment.
Background
In the technical field of foundation pit support, along with the great popularization and application of foundation pit diagonal braces, inclined drilling, rotary spraying, stirring and pile planting equipment attracts more and more attention of technicians.
The existing inclined strut is more applied, from bottom to top, the general structure is a combined inclined pile formed by core piles such as cement soil rotary spraying stirring piles or cement high-pressure rotary spraying piles, steel pipe piles or reinforced concrete precast pipe piles and the like below a foundation pit bottom plate, a steel strut formed by the steel lattice columns or the steel pipe piles above the foundation pit bottom plate connected with the top end of the combined inclined pile, and the top end of the steel strut is fixedly connected with a steel corbel of a top-pressing surrounding beam at the top end of a foundation pit enclosure wall or a foundation pit enclosure row pile.
The inclined drilling rotary spraying stirring pile planting equipment for constructing the inclined support in the prior art generally comprises a chassis or a base of a host supported on the ground surface of a foundation pit, wherein the chassis generally comprises a travelling mechanism such as a longitudinal moving mechanism and a transverse moving mechanism; an inclined strut for drilling, rotary spraying, stirring and pile planting is arranged on the chassis and is also called as a guide frame, and an inclined strut angle adjusting oil cylinder is arranged between the chassis and the inclined strut; the inclined strut is provided with a power head and a pile pressing cap or a clamp for clamping a core pile or a steel support, the inclined strut is provided with an oil cylinder for connecting a drill rod or disassembling the drill rod, the chassis and the inclined strut are provided with two groups of driving mechanisms which are used for driving the power head and the pile pressing cap to move linearly along the inclined strut and are composed of a winch, a steel wire rope and a pulley block, one group of driving mechanisms is released and the other group of driving mechanisms is retracted, the driving power head drives the drill rod to drill downwards and the pile pressing cap to press the core pile or the steel support downwards, or the one group of driving mechanisms is retracted and the other group of driving mechanisms is released, and the driving power head drives the drill rod and the pile pressing cap to reset; the drill rod is internally provided with a high-pressure cement slurry conveying pipe communicated with a cement slurry source and a pump and a slurry spraying port positioned at the drill bit, and the drilling of the drill bit at the slurry spraying port and the propelling of the core pile and the steel support are synchronously carried out. The high pressure such as the pressure of the slurry conveying pipe and the pressure of the nozzle are both 20-35MPa.
However, in the actual construction process, the inclined drilling and rotary spraying stirring pile planting equipment in the prior art still has the following defects: because the drilling rod is the inclined drilling, core pile and steel shotcrete also are the inclined propulsion like steel lattice column or steel-pipe pile, because the drilling rod and core pile get into the length in the soil body longer like terrace face to foundation ditch bottom plate about 8 meters deep, foundation ditch bottom plate to predetermined bottom elevation about 18 meters deep, totally about 26 meters deep, drilling rod drilling and core pile and steel shotcrete propulsion process are difficult to avoid the drilling rod lower extreme flagging, drill out arc hole and core pile and jet grouting pile decentraction promptly cement soil jet grouting mixing pile to core pile's phenomenon such as protection thickness is inhomogeneous, direct influence combination batter pile and steel shotcrete promptly foundation ditch bearing capacity, it is difficult to guarantee that the batter brace has very high ability of resisting the soil body lateral pressure that foundation ditch enclosure wall or foundation ditch enclosure row pile and pressure top surrounding beam bore, the potential safety hazard that the foundation ditch sinks exists even, need to improve urgently.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can prevent that the drilling rod lower extreme is flagging, the hole straightness accuracy that drills out is high and core stake and cement soil spout the concentric locating rack that is used for slant drilling to spout the stirring soon and plants stake equipment drilling rod and core stake that the stirring stake concentricity is good soon.
The technical solution of the utility model is that, a concentric locating rack that is used for inclined drilling to spout stirring soon and plants stake equipment drilling rod and core stake is provided, and the shape of cross section of concentric locating rack is the same with the shape of cross section of core stake hole, concentric locating rack and core stake hole clearance fit, the circular centre bore of concentric locating rack and the outer circumference clearance fit of drilling rod.
After the structure above adopting, the utility model relates to a concentric locating rack that is used for inclined drilling to spout stirring soon and plants stake equipment drilling rod and core stake has following advantage: the concentric positioning frame enables the axis of the drill rod, the axis of the drill bit and the axis of the core pile such as a steel lattice column core pile or a reinforced concrete prefabricated pipe core pile or a steel pipe pile core pile to be concentric with a pore-forming body, namely, the axes are on the same straight line, the drill bit which is coaxial with the drill rod and is positioned at the bottom end of the drill rod can prevent or even avoid the lower end of the drill rod from sagging during the drilling process and the propelling process of the core pile and the steel support, the straightness of the drilled hole is good, the concentricity of the core pile and the cement soil jet stirring pile is good, namely, the basic coaxial line, so that the thickness of the cement soil jet stirring pile coating the core pile is uniform, even if the protection thickness of the cement soil jet stirring pile to the core pile is uniform, the design strength and the bearing capacity of the combined inclined pile and the steel support, namely the foundation pit inclined support are greatly improved, the foundation pit inclined support is well ensured to have high capability of resisting the lateral pressure of a foundation pit enclosure wall or a foundation pit row pile and a capping enclosure beam, and the potential safety hazard of the foundation pit collapse is basically eliminated.
Furthermore, one or more concentric locating frames are distributed along the axial length of the inner hole of the core pile, and one concentric locating frame is positioned at the inner bottom end of the core pile. After the structure more than adopting, the concentricity that makes core stake and drilling rod is the axiality better, has further improved the utility model discloses the lower extreme of avoiding the drilling rod is flagging, the hole straightness accuracy of drilling is good, make cement soil spout the churning pile soon even, improve combination batter pile and steel shotcrete and be the technological effect such as design strength and bearing capacity of foundation ditch bearing diagonal brace promptly to the protection thickness of core stake.
Furthermore, the drill rods at the two ends of the concentric positioning frame are provided with the concentric positioning frame axial limiting structures. After the structure is adopted, the concentric positioning frame is more flexible to advance along with the drill rod, so that a good concentric positioning effect is ensured, and convenience in entering and exiting is ensured so as to be reused.
Furthermore, the axial limiting structure is an axial limiting ring welded on the drill rods at two ends of the concentric positioning frame. After adopting above structure, axial limit structure is simpler, more firm and more reliable, has further guaranteed the convenient and technological effect that can used repeatedly of business turn over.
Furthermore, a first concentric positioning frame matched with the square hole of the steel lattice column core pile is a square frame, the centers of two ends of the square frame are respectively provided with a first drill rod sleeve, the square frame and the first drill rod sleeves are welded and fixed through a plurality of first connecting blocks, and the axis of a first circular center hole of the first drill rod sleeve and the axis of the square frame are on the same straight line. After the structure is adopted, the first concentric positioning frame is very suitable for the steel lattice column core pile, the technical effect that the drill rod and the steel lattice column are concentric, namely, the coaxial line is better, the technical effects that the lower end of the drill rod is prevented from drooping in the steel lattice column core pile, the straightness of a drilled hole is good, the protection thickness of the cement soil rotary spraying stirring pile on the steel lattice column core pile is uniform, the design strength and the bearing capacity of a combined inclined pile and a steel support, namely, a foundation pit inclined support are improved, and the like are further improved.
Furthermore, a second concentric positioning frame matched with a circular hole of the reinforced concrete prefabricated pipe pile core pile or the steel pipe pile core pile is a circular outer sleeve, a second drill rod sleeve is respectively arranged at the centers of two ends of the circular outer sleeve, the circular outer sleeve and the second drill rod sleeve are welded and fixed through a plurality of second connecting blocks, and the axis of a second circular center hole of the second drill rod sleeve and the axis of the circular outer sleeve are on the same straight line. After the structure is adopted, the second concentric positioning frame is very suitable for the reinforced concrete prefabricated tubular pile core pile or the steel tubular pile core pile, the technical effect that the drill rod and the reinforced concrete prefabricated tubular pile core pile or the steel tubular pile core pile with the circular hole are concentric, namely coaxial, is better, the lower end of the drill rod is prevented from drooping in the reinforced concrete prefabricated tubular pile core pile or the steel tubular pile core pile, the straightness of the drilled hole is good, the protection thickness of the cement soil rotary spraying stirring pile on the reinforced concrete prefabricated tubular pile core pile or the steel tubular pile core pile is more uniform, and the design strength and the bearing capacity of the combined inclined pile and the steel support, namely the foundation pit inclined support are further improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of an inclined drilling jet grouting stirring pile-planting device applied to the concentric positioning frame of the present invention (the concentric positioning frame is sleeved in a steel lattice column core pile).
Fig. 2 is a schematic structural view of a square concentric spacer after the steel lattice column in fig. 1 is omitted.
Fig. 3 is an enlarged schematic view of a in fig. 2.
Fig. 4 is an enlarged view of the concentric positioner of fig. 3 at an angle.
Fig. 5 is a schematic structural view of another embodiment of the inclined drilling jet-grouting stirring pile-planting device applied to the concentric positioning frame of the present invention (the concentric positioning frame is sleeved in the prefabricated reinforced concrete tubular pile core pile).
Fig. 6 is a structural schematic diagram of the circular concentric positioning frame after the reinforced concrete prefabricated pipe pile core pile on the outer side in fig. 5 is omitted.
Fig. 7 is an enlarged structural view of B in fig. 6.
Shown in the figure: 1. the device comprises a crane, 2, a terrace surface, 3, a chassis, 4, a hole forming body, 5, a drill bit, 6, a steel lattice column core pile, 7, an angle adjusting oil cylinder, 8, a pile pressing cap, 9, a power head, 10, an inclined strut, 11, a drill rod, 12, a first concentric positioning frame, 13, an axial limiting ring, 14, a square frame, 15, a first drill rod sleeve, 16, a first circular central hole, 17, a first connecting block, 18, a reinforced concrete prefabricated pipe pile core pile, 19, a second concentric positioning frame, 20, a circular outer sleeve, 21, a second connecting block, 22, a second circular central hole, 23 and a second drill rod sleeve.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. In addition, the technical means described in the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, 2, 3, 4, 5, 6 and 7.
The inclined drilling rotary spraying stirring pile planting equipment for the construction foundation pit diagonal bracing comprises a chassis 3 of a host, wherein the chassis 3 generally comprises a travelling mechanism such as a longitudinal moving mechanism and a transverse moving mechanism. The chassis 3 can also be provided with a crane 1. An inclined strut 10 for drilling, rotary spraying, stirring and pile planting is arranged on the chassis 3, and an angle adjusting oil cylinder 7 of the inclined strut 10 is arranged on the chassis 3 and the inclined strut 10. The inclined strut 10 is provided with a power head 9 and a pile pressing cap 8, the inclined strut 10 is provided with an oil cylinder for connecting the drill rod 11 or detaching the drill rod 11, the chassis 3 and the inclined strut 10 are provided with driving mechanisms for driving the power head 9 and the pile pressing cap 8 to linearly move along the inclined strut 10, for example, the chassis 3 and the inclined strut 10 are provided with two groups of driving mechanisms which are used for driving the power head 9 and the pile pressing cap 8 to linearly move along the inclined strut 10 and are composed of a winch, a steel wire rope and a pulley block, one group is placed and the other group is placed, the driving power head 9 drives the drill rod 11 and the drill bit 5 to drill downwards, the pile pressing cap 8 presses the core pile and the steel support downwards, or the one group is placed and the other group is placed, and the driving power head 9 drives the drill rod 11 and the pile pressing cap 8 to reset or return. High-pressure cement slurry conveying pipes communicated with a cement slurry source and a pump are arranged in the drill rod 11 and on the drill bit 5, a slurry spraying port is formed in the drill bit 5, high-pressure cement slurry is sprayed from the slurry spraying port when the drill bit 5 drills down, core piles and steel supports are pushed to be carried out synchronously, the cement slurry source such as a cement slurry pool is arranged on the ground surface 2, and a feed inlet of the high-pressure conveying pump is communicated with the cement slurry pool. The high pressure such as the pressure of the slurry conveying pipe and the pressure of the nozzle can be both 20-35MPa. The inclined drilling rotary spraying stirring pile planting equipment is generally arranged on the terrace surface 2 of a foundation pit to be excavated during construction. It is not difficult to understand that in the actual construction process, the cement-soil rotary-spraying stirring pile is also sprayed in a rotary mode on the upper portion of the foundation pit bottom plate while drilling and stirring are conducted, however, after the foundation pit bottom plate is excavated, the cement-soil rotary-spraying stirring pile on the upper portion of the foundation pit bottom plate is knocked off, and only steel supports are left on the upper portion of the foundation pit bottom plate. The above is the prior art. The invention of the utility model is characterized in that:
the utility model provides a concentric locating rack that is used for inclined drilling to spout stirring pile planting equipment drilling rod and core stake soon can express as: a concentric locating rack that is used for drilling rod and core stake of inclined drilling rotary spraying stirring stake planting equipment. The cross section shape of the concentric locating rack is the same as that of the inner hole of the core pile, the concentric locating rack is in clearance fit with the inner hole of the core pile, and the circular central hole of the concentric locating rack is in clearance fit with the outer circumference of the drill rod 11.
The concentric positioning frame makes the axial line of the drill rod 11, the axial line of the drill bit 5, the axial line of the core pile such as the steel lattice column core pile 6 or the reinforced concrete prefabricated pipe core pile 18 or the steel pipe core pile concentric with the axial line of the pore-forming body 4, namely the axial lines are on the same straight line. The porous body 4 may also be referred to as a drilled hole.
The concentric locating racks are one or more and distributed along the axial length of the inner hole of the core pile, and one concentric locating rack is arranged at the inner bottom end of the core pile. The core pile is characterized in that if a plurality of concentric positioning frames are arranged in the same core pile, one concentric positioning frame is positioned at the inner bottom end of the core pile, and the other concentric positioning frame is positioned at other axial positions of the core pile; if only one concentric locating frame is arranged in the same core pile, the concentric locating frame is positioned at the inner bottom end of the core pile.
The drill rod 11 at the two ends of the concentric positioning frame is provided with an axial limiting structure of the concentric positioning frame. The axial stop structure is preferably an axial stop ring 13 welded to the drill pipe 11 at both ends of the concentric positioning frame.
The first concentric positioning frame 12 matched with the square hole of the steel lattice column core pile 6 is a square frame 14, the centers of two ends of the square frame 14 are respectively provided with a first drill rod sleeve 15, the square frame 14 and the first drill rod sleeves 15 are fixed in a welding mode through a plurality of first connecting blocks 17, and the axis of a first circular central hole 16 of the first drill rod sleeve 15 is on the same straight line with the axis of the square frame 14.
The second concentric positioning frame 19 matched with the circular hole of the reinforced concrete prefabricated tubular pile core pile 18 or the steel tubular pile core pile is a circular outer sleeve 20, the centers of two ends of the circular outer sleeve 20 are respectively provided with a second drill rod sleeve 23, the circular outer sleeve 20 and the second drill rod sleeve 23 are welded and fixed through a plurality of second connecting blocks 21, and the axis of a second circular central hole 22 of the second drill rod sleeve 23 is on the same straight line with the axis of the circular outer sleeve 20.
The first 15 and second 23 drill sleeves may each be circular in outer shape.
After the construction of the core pile 6 of the obliquely supported steel lattice column and the steel lattice column steel support at the top of the core pile is completed, the first concentric positioning frame 12 is brought back to the ground surface 2 by the drill rod 11 when the drill rod 11 is reset, so that the first concentric positioning frame can be used repeatedly.
After the construction of an inclined support reinforced concrete prefabricated pipe pile core pile 18 or steel pipe pile core pile and a steel lattice column steel support or steel pipe pile steel support at the top of the inclined support is completed, the second concentric positioning frame 19 is brought back to the ground surface 2 by the drill rod 11 when the drill rod 11 is reset so as to be used repeatedly.
The concentric positioning frame can also be arranged in a hole of a steel pipe pile steel support or a steel lattice column steel support.
It will be appreciated that the clearance fit described above is a very regular term, and the dimensions of the first concentric locating bracket 12 and the square hole of the pile 6, such as a steel lattice cylinder, are greater than or equal to the dimensions of the square frame 14 of the square first concentric locating bracket 12.
The first circular central hole 16 of the first concentric positioning frame 12 is in clearance fit with the outer circumference of the drill rod 11, which means that the aperture of the first circular central hole 16 of the first concentric positioning frame 12 is larger than or equal to the outer diameter of the drill rod 11, that is, the first circular central hole 16 of the first concentric positioning frame 12 is in sliding fit with the drill rod 11.
The diameter of the circular hole of the reinforced concrete prefabricated tubular pile core pile 18 or the steel pipe pile is larger than or equal to the outer diameter of the circular second concentric positioning frame 19.
The second circular central hole 22 of the second concentric locating rack 19 is in clearance fit with the outer circumference of the drill rod 11, which means that the diameter of the second circular central hole 22 of the second concentric locating rack 19 is greater than or equal to the outer diameter of the drill rod 11, that is, the second circular central hole 22 of the second concentric locating rack 19 is in sliding fit with the drill rod 11.
Concentric and coaxial lines are to be understood as meaning one.
It is easy to understand, spare part all adopt steel preparation to form.
The components or features or quantities not labeled above are not shown in the figures. The drawings are merely schematic representations, to the extent that they do not conform to the written description, will be referred to.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a concentric locating rack that is used for slant drilling to spout stirring pile planting equipment drilling rod and core pile soon, its characterized in that: the cross section shape of the concentric positioning frame is the same as that of the inner hole of the core pile, the concentric positioning frame is in clearance fit with the inner hole of the core pile, and the circular center hole of the concentric positioning frame is in clearance fit with the outer circumference of the drill rod.
2. The concentric positioning frame for the drill rod and the core pile of the inclined drilling, jet grouting, stirring and pile planting equipment according to claim 1, which is characterized in that: one or more concentric locating frames are distributed along the axial length of the inner hole of the core pile, and one concentric locating frame is positioned at the inner bottom end of the core pile.
3. The concentric positioning frame for the drill rod and the core pile of the inclined drilling, jet grouting, stirring and pile planting equipment according to claim 1, which is characterized in that: the drill rods at the two ends of the concentric positioning frame are provided with the concentric positioning frame axial limiting structures.
4. The concentric positioning frame for the drill rod and core pile of the inclined drilling rotary spraying stirring pile planting equipment according to claim 3, characterized in that: the axial limiting structure is an axial limiting ring welded on the drill rod at two ends of the concentric positioning frame.
5. The concentric positioning frame for the drill rod and core pile of the inclined drilling rotary spraying stirring pile planting equipment according to claim 1, characterized in that: the first concentric positioning frame matched with the square hole of the steel lattice column core pile is a square frame, the centers of two ends of the square frame are respectively provided with a first drill rod sleeve, the square frame and the first drill rod sleeves are welded and fixed through a plurality of first connecting blocks, and the axis of a first circular center hole of the first drill rod sleeve is in the same straight line with the axis of the square frame.
6. The concentric positioning frame for the drill rod and core pile of the inclined drilling rotary spraying stirring pile planting equipment according to claim 1, characterized in that: the second concentric positioning frame matched with the circular hole of the reinforced concrete prefabricated pipe pile core pile or the steel pipe pile core pile is a circular outer sleeve, the centers of two ends of the circular outer sleeve are respectively provided with a second drill rod sleeve, the circular outer sleeve and the second drill rod sleeves are welded and fixed through a plurality of second connecting blocks, and the axis of a second circular center hole of the second drill rod sleeve and the axis of the circular outer sleeve are on the same straight line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853955.8U CN217925719U (en) | 2022-07-18 | 2022-07-18 | Concentric positioning frame for drill rod and core pile of inclined drilling rotary spraying stirring pile planting equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221853955.8U CN217925719U (en) | 2022-07-18 | 2022-07-18 | Concentric positioning frame for drill rod and core pile of inclined drilling rotary spraying stirring pile planting equipment |
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| CN217925719U true CN217925719U (en) | 2022-11-29 |
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| CN202221853955.8U Active CN217925719U (en) | 2022-07-18 | 2022-07-18 | Concentric positioning frame for drill rod and core pile of inclined drilling rotary spraying stirring pile planting equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233667A (en) * | 2022-07-18 | 2022-10-25 | 厦兴科技(浙江)有限公司 | Inclined drilling rotary spraying stirring pile planting equipment |
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2022
- 2022-07-18 CN CN202221853955.8U patent/CN217925719U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233667A (en) * | 2022-07-18 | 2022-10-25 | 厦兴科技(浙江)有限公司 | Inclined drilling rotary spraying stirring pile planting equipment |
| CN115233667B (en) * | 2022-07-18 | 2024-04-19 | 厦兴科技(浙江)有限公司 | Inclined drilling rotary spraying stirring pile planting equipment |
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